US4113976A
Expired / Lapsed
US
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Method of preparing 2,6-di-tert.butylphenol
Assignee: Individual
•
Filing: 1977-04-18
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Granted: 1978-09-12
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Expires: 1997-04-18
Abstract
Abstract A method of preparing 2,6-di-tert.butylphenol comprises alkylation of phenol with isobutylene at a temperature within the range of from 100° to 110° C in the presence, as a catalyst, of phenyloxyorthotertbutylphenoxyhydroaluminum acid of the formula: [(OC.sub.6 H.sub.5).sub.n (ortho-tert.C.sub.4 H.sub.9 C.sub.6 H.sub.4 O) m Al]H wherein n = 1 to 3; m = 1 to 3; n + m = 4. The method of the present invention makes it possible to increase the product yield to 80% by weight and to conduct the process under atmospheric pressure.
Inventors
- 👤 Jury Ivanovich Michurov
- 👤 Boris Izrailevich Pantukh
- 👤 Valerian Mikhailovich Sobolev
- 👤 Grigory Iosifovich Rutman
- 👤 Igor Jurievich Logutov
- 👤 Vladimir Romanovich Dolidze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:10
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; B; B01; B01J; B01J31/00; B01J31/02; B01J31/0201; B01J31/0211; B01J31/0214; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/323; B01J2531/00; B01J2531/30; B01J2531/31; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A method of preparing 2,6-di-tertbutylphenol comprising alkylation of phenol with isobutylene at a temperature of from 100° to 110° C C. the presence of 0.5 to 1% by weight of phenoloxyorthotertbutylphenoxyhydroaluminum acid having the formula: [(OC.sub.6 H.sub.5).sub.n (ortho-tert.C.sub.4 H.sub.9 C.sub.6 H.sub.4 O).sub.m Al]H wherein n== 1 to 3, m= 1 to 3; n+m= 4, to form an alkylate, hydrolyzing said catalyst; vacuum rectifying the alkylate; and recovering 2,6-di-tertbutylphenol by recrystallization.
Claim 2
Independent Claim
70 words
A method of preparing 2,6-di-tertbutylphenol comprising alkylation of phenol with isobutylene at a temperature of from 100° to 110° C C. the presence of 0.5 to 1% by weight of phenoloxyorthotertbutylphenoxyhydroaluminum acid having the formula: [(OC.sub.6 H.sub.5).sub.n (ortho-tert.C.sub.4 H.sub.9 C.sub.6 H.sub.4 O).sub.m Al]H wherein n== 1 to 3, m= 1 to 3; n+m= 4, to form an alkylate, hydrolyzing said catalyst; vacuum rectifying the alkylate; and recovering 2,6-di-tertbutylphenol by recrystallization.
References Cited (Backward Citations)
US3766276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |